5G Mobile Device Positioning via Dynamic PRS Beam Scheduling

Solution Overview

Problem

Existing 5G wireless networks lack accurate elevation/altitude estimation methods for mobile device positioning, leading to increased latency and power consumption due to the need for extensive beam scanning and measurement across multiple directions.

Innovation Solution

Implement dynamic PRS scheduling and beam forming along specific azimuth and elevation angles, utilizing a codebook of SSB indices and angular information to optimize PRS measurements, allowing for simultaneous multi-beam detection and reduced measurement latency.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Measurement precision

If extensive beam scanning and measurement across multiple directions is performed for positioning, then positioning accuracy is improved, but positioning latency and power consumption increase

Engineering Contradiction:

Improvepositioning accuracyVSAvoidpositioning latency

Core Design Contradiction:

Measurement precisionVSLoss of time

Solution Approach 1:

The network node pre-configures the mobile device with a codebook containing SSB indices and angular information corresponding to different beams before positioning measurement. This preliminary provision of measurement targets allows the mobile device to efficiently identify and measure only relevant beams without extensive scanning, thereby reducing positioning latency while maintaining accuracy

Inventive Principle:

Principle #10Preliminary action

Solution Approach 2:

The codebook provides localized and targeted beam information (specific SSB indices and angular directions) relevant to the mobile device's position and movement pattern. Instead of requiring measurement across all possible directions, the solution focuses measurement resources on locally relevant beams, reducing overall measurement time and power consumption

Inventive Principle:

Principle #3Local quality

2Measurement precision

If extensive beam scanning and measurement across multiple directions is performed for positioning, then positioning accuracy is improved, but power consumption increases

Engineering Contradiction:

Improvepositioning accuracyVSAvoidpower consumption

Core Design Contradiction:

Measurement precisionVSUse of energy by moving object

Solution Approach 1:

The network node pre-configures the mobile device with a codebook containing SSB indices and angular information corresponding to different beams before positioning measurement. This preliminary provision of measurement targets allows the mobile device to efficiently identify and measure only relevant beams without extensive scanning, thereby reducing positioning latency while maintaining accuracy

Inventive Principle:

Principle #10Preliminary action

Solution Approach 2:

The codebook provides localized and targeted beam information (specific SSB indices and angular directions) relevant to the mobile device's position and movement pattern. Instead of requiring measurement across all possible directions, the solution focuses measurement resources on locally relevant beams, reducing overall measurement time and power consumption

Inventive Principle:

Principle #3Local quality

3Measurement precision

If dynamic PRS scheduling and beam forming along specific azimuth and elevation angles is implemented, then location determination accuracy is improved, but system complexity increases

Engineering Contradiction:

Improvelocation determination accuracyVSAvoidsystem complexity

Core Design Contradiction:

Measurement precisionVSDevice complexity

Solution Approach 1:

The network node pre-configures the mobile device with a codebook containing SSB indices and angular information corresponding to different beams before positioning measurement. This preliminary provision of measurement targets allows the mobile device to efficiently identify and measure only relevant beams without extensive scanning, thereby reducing positioning latency while maintaining accuracy

Inventive Principle:

Principle #10Preliminary action

Solution Approach 2:

The codebook acts as an intermediary data structure that bridges the network's beam configuration and the mobile device's measurement process. It translates complex network beamforming parameters into simplified measurement targets (SSB indices and angles), reducing the processing complexity at the mobile device while enabling accurate 3D positioning

Inventive Principle:

Principle #24Intermediary (Mediator)

Data Source

PatentEP3874293B1Positioning enhancements for locating a mobile device in a wireless network

Publication Date: 2025.09.24 QUALCOMM INC

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AI summary

Techniques for determining a location of a mobile device are provided. An example of a method according to the disclosure includes determining, on the mobile device, beam identification information for one or more radio beams, transmitting, with the mobile device, the beam identification information to a network node, receiving, at the mobile device, positioning reference signal beam information for one or more positioning reference signals, generating, with the mobile device, one or more receive beams based on the positioning reference signal beam information, obtaining, with the mobile device, at least one measurement from at least one of the one or more positioning reference signals, and facilitating location determination of the mobile device at a location-capable device based at least in part on the at least one measurement.